"Over 1,500 men, women and children of Chakma and Tripuri tribes have taken shelter in the India-Bangladesh border village at Karbook after feeling from five villages in Khagrachari district," Border Security Force (BSF) Deputy Inspector General Bhaskar Rawat told IANS.
"The tribals entered Indian territory Saturday evening after ethnic troubles in Bangladesh. They were stopped at the border by the BSF. We are providing them food and other assistance."
The tribals, mostly Buddhists and Hindus, fled the Chittagong Hill Tracts after clashes over the reported abduction of a local leader of the Bangladesh Nationalist Party (BNP), the main opposition in Bangladesh led by former prime minister Khaleda Zia.
An official of the Tripura home department said the state government has informed the home ministry about the development.
"At least one tribal villager was killed, four tribals were seriously injured and about 500 tribal houses were burnt to ashes," Delhi-based rights group, Asian Centre for Human Rights (ACHR) director Suhas Chakma said in a press release.
Additional troopers of the BSF have been deployed along the India-Bangladesh border to deal with the situation.
"The villagers have been insisting that officials of the Bangladesh government and BGB (Border Guard Bangladesh) should talk to them," Rawat said.
In 1986, over 74,000 tribals - mostly Buddhist Chakmas - took shelter in southern Tripura following violent attacks on thousands of tribals by non-tribals.
Demanding a sovereign status for tribals in Chittagong, separatist outfit Shanti Bahini had waged a guerrilla warfare against the Bangladesh government.
All the 74,000 refugees had returned to their homes in 1997-98 after the Bangladesh government signed a peace agreement with Shanti Bahini.
Tripura shares a 856-km border with Bangladesh, which is porous because it extends over mountains that are densely forested. Most parts of the border have been fenced.